DOCUMENT:Q279404 06-AUG-2002 [exchange] TITLE :XCON: Site Scope Address Space Considerations PRODUCT :Microsoft Exchange PROD/VER::5.5 OPER/SYS: KEYWORDS:exc55 ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Exchange Server, version 5.5 ------------------------------------------------------------------------------- SYMPTOMS ======== When you configure the Exchange Server 5.5 Internet Mail Service with an address space of "*" that is restricted to a site scope, when you send mail from a remote site, the mail is still processed as outbound to the Internet by the Internet Mail Service. CAUSE ===== In Exchange 5.5, the Message Transfer Agent (MTA) is responsible for all routing decisions in the site. The MTA routes on a hop-by-hop basis, and is not aware of previous MTA routing decisions. When mail enters this site, the local MTAs realize that the Simple Mail Transfer Protocol (SMTP) route is available. They then route the mail to the local Internet Mail Service. STATUS ====== This behavior is by design. MORE INFORMATION ================ The explanation in this section is based on the following scenario: - : (Internet Mail Service scope setting: Organization) - : (Internet Mail Service scope setting: This Site) - Both Internet Mail Services have an address space of "*" and a cost of 1. - All servers in and are Exchange Server 5.5 Service Pack 3 (SP3) builds. - is connected to by a site connector; and are connected to one or more downstream sites () by X.400 connectors. - SiteB is a hub for To configure the scope settings for the Internet Mail Service, follow these steps: 1. Start the Exchange Administrator program. 2. Right-click Internet Mail Service, click Properties, and then click the Address Space tab. 3. Edit the properties of the address space, and then click the Restrictions tab. 4. The scope setting is set to Organization by default. The two other options for scope are This Site and This Location. If you configure the scope setting for the Internet Mail Service in to This Site, the SMTP route is not known or replicated outside of this site. The MTAs in are only aware of the SMTP address space setting for ; therefore, they route Internet mail to . On the way to , mail passes through . When mail bound for the Internet enters this site, it is routed correctly because the MTAs in are aware of a local SMTP route. If you configure the scope setting to This Location, the route is only known to the present server, or group of servers in this site. If Internet mail is processed by this server or group of servers (location), mail may be routed to the scoped address space. Additional query words: routing IMC IMS ====================================================================== Keywords : exc55 Technology : kbExchangeSearch kbExchange550 kbZNotKeyword2 Version : :5.5 Issue type : kbprb ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2002.